Grilled Mac and Cheese Sandwich

Why this dinner works

Most weeknight one-pot dinners ask you to choose between two evils: a five-ingredient bowl that tastes like the inside of a saucepan, or a recipe so layered it eats your entire evening. Grilled Mac and Cheese Sandwich sits comfortably in the middle. It draws on United States traditions where building flavor in stages — aromatics, then spice, then the slow swell of liquid into starch — is just how dinner gets made on a regular Tuesday.

The whole thing comes together in about 82 minutes in a single sheet pan, which means dinner from idea to table is shorter than most podcast episodes. We've leaned on the everyday 17 ingredients listed below, but in the notes after the recipe you'll find the small swaps and shortcuts that make this dish forgiving when your fridge is half-empty.

Method

1. Step 1. Make the mac and cheese
2. Step 2. 1. Bring a medium saucepan of generously salted water (you want it to taste like seawater) to a boil. Add the pasta and cook, stirring occasionally, until al dente, 8 to 10 minutes, or according to the package directions. The pasta should be tender but still chewy.
3. Step 3. 2. While the pasta is cooking, in a small bowl, whisk together the flour, mustard powder, garlic powder, salt, black pepper, and cayenne pepper.
4. Step 4. 3. Drain the pasta in a colander. Place the empty pasta pan (no need to wash it) over low heat and add the butter. When the butter has melted, whisk in the flour mixture and continue to cook, whisking frequently, until the mixture is beginning to brown and has a pleasant, nutty aroma, about 1 minute. Watch carefully so it does not scorch on the bottom of the pan.
5. Step 5. 4. Slowly whisk the milk and cream into the flour mixture until everything is really well combined. Cook, whisking constantly, until the sauce is heated through and just begins to thicken, about 2 minutes. Remove from the heat. Gradually add the cheese while stirring constantly with a wooden spoon or silicone spatula and keep stirring until the cheese has melted into the sauce. Then stir in the drained cooked pasta.
6. Step 6. 5. Line a 9-by-13-inch (23-by-33-centimeter) rimmed baking sheet with parchment paper or aluminum foil. Coat the paper or foil with nonstick cooking spray or slick it with butter. Pour the warm mac and cheese onto the prepared baking sheet and spread it evenly with a spatula. Coat another piece of parchment paper with cooking spray or butter and place it, oiled or buttered side down, directly on the surface of the mac and cheese. Refrigerate until cool and firm, about 1 hour.
7. Step 7. Make the grilled cheese
8. Step 8. 6. Heat a large cast-iron or nonstick skillet over medium-low heat.
9. Step 9. 7. In a small bowl, stir together the 4 tablespoons (55 grams) butter and garlic powder until well blended.
10. Step 10. 8. Remove the mac and cheese from the refrigerator and peel off the top layer of parchment paper. Carefully cut into 8 equal pieces. Each piece will make 1 grilled mac and cheese sandwich. (You can stash each individual portion in a double layer of resealable plastic bags and refrigerate for up to 3 days or freeze it for up to 1 month.)
11. Step 11. 9. Spread 3/4 teaspoon garlic butter on one side of each bread slice. Place half of the slices, buttered-side down, on a clean cutting board. Top each with one slice of Cheddar, then 1 piece of the mac and cheese. (Transfer from the baking sheet by scooting your hand or a spatula under each piece of mac and cheese and then flipping it over onto a sandwich.) Place 1 slice of Jack on top of each. Finish with the remaining bread slices, buttered-side up.
12. Step 12. 10. Using a wide spatula, place as many sandwiches in the pan as will fit without crowding it. Cover and cook until the bottoms are nicely browned, about 4 minutes. Turn and cook until the second sides are browned, the cheese is melted, and the mac and cheese is heated through, about 4 minutes more.
13. Step 13. 11. Repeat with the remaining ingredients. Cut the sandwiches in half, if desired, and serve.

Cook's notes

One pan, fewer dishes. Use the widest, heaviest sheet pan you own with a tight-fitting lid. The wider base means faster browning at the start; the lid traps the gentle steam that finishes the dish without scorching the bottom.

Salt as you go. Season the aromatics, season the protein, season the liquid before it reduces. By the time you taste at the end, the only adjustment is usually acid — a squeeze of lemon, a splash of vinegar, a final crack of pepper.

Make it ahead. Like most one-pot dinners with united states roots, the leftovers are arguably better the next day. Cool quickly, refrigerate within two hours, and reheat gently with a splash of water or stock to loosen things back up.

Pairings & serving

This one feels best in a 6-bowl spread with a sharp green salad and something cold to drink. If you want to stretch it for unexpected company, double the liquid and a single starchy ingredient — rice, pasta, potatoes, depending on the recipe — and the whole pan grows without much extra work.

Watch it cooked

If you're a visual learner, there's a free walkthrough of this dish on YouTube.

Original recipe inspiration: source.